According to new test data, the touchscreens on Apple’s recently released iPhone 5S and 5C show significant degradation in touch detection accuracy along their edges, which can affect hitting outside keys on the iOS virtual keyboard. Using a robotic finger and a specialized suite of test software, Finnish automated testing company, OptoFidelity, found that Apple’s latest handsets accurately detect touch inputs only across a small swath of their displays, roughly equating to the location of the on-screen keyboard.

Both the iPhone 5S and 5C suffer from “extremely